You will need to buy, download and install the programs for each of those years on your computer to file separate tax returns for each year. Here is a link to buy all three years separately: https://turbotax.intuit.com/personal-taxes/past-years-products/
Prior year returns can't be efiled. You must print and mail them yourself. Mail each year in a separate envelope.
If you have simple tax returns, you might be able to fill out the forms by yourself. Here is an IRS link to find and download the forms for each year: https://www.irs.gov/forms-pubs/prior-year
There are instructions for completing them at the IRS web site.
